High differences in AOA comparing wheat and buckwheat flour extracts
were showed in reducing power assay (Figure 2). Better antioxidant activity
was found in buckwheat than in wheat flours indicated with lower IC50 values.
Strong antioxidative activity of buckwheat flour extracts might be attributed
to the presence of polyphenols, especially rutin, as the main antioxidative
component in buckwheat (D i e t r y c h - S z o s t a k and O l e s z e k, 1999).
Rutin possesses all structural features which have been demonstrated to increase
antioxidative activity of flavonoids and their O-glycosides (Af a n a s ' e v
et al., 1989).